But it is a fact that the prevailing westerlies have been stronger and more frequent this year in YSSY and that has necessitated the use of R25 more often, slowing the flow rate.
So from the one fact you are extrapolating that it is a result of climate change. Or the fact of stronger and more frequent westerlies could be attributed to an aberration in the mean strength and occurrence over the period in which wind speed at Sydney Airport has been kept. Thats the problem with the science of climate. It takes short term data points, plots them on a graph and looks forward in time to a point it thinks it will keep going to. Reminds me a lot of Alan Kohlers economic graphs. Yet economic downturns always seem to take the economists by surprise.